Lines And Angles CBSE Questions & Answers

Lines And Angles

This is Mathematics Class 09 Lines and Angles CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
An exterior angle of a triangle is 80\(^0\) and two interior opposite angles are equal. Measure of each of these angles is :
  • A
    100\(^0\)
  • B
    40\(^0\)
    Correct
  • C
    120\(^0\)
  • D
    60\(^0\)
2
The angle which is equal to 8 times its complement is :
  • A
    80\(^0\)
    Correct
  • B
    88\(^0\)
  • C
    72\(^0\)
  • D
    90\(^0\)
3
If two supplementary angles are in the4 ratio 2 : 7, then the angles are :
  • A
    35\(^0\), 145\(^0\)
  • B
    40\(^0\), 140\(^0\)
    Correct
  • C
    50\(^0\), 130\(^0\)
  • D
    70\(^0\), 110\(^0\)
4
In the given figure, the value of x which makes POQ a straight line is :
Question 4 figure 1
  • A
    40
  • B
    35
  • C
    30
  • D
    25
    Correct
5
If two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2 : 3, then the largest of two angles is :
  • A
    36\(^0\)
  • B
    54\(^0\)
  • C
    108\(^0\)
    Correct
  • D
    72\(^0\)
6
In figure, PQ \(\parallel \) RS, \(\angle\) QPR = \(70^\circ \), \(\angle \) ROT = \(20^\circ \) find the value of x.
Question 6 figure 1
  • A
    20\(^0\)
  • B
    110\(^0\)
  • C
    50\(^0\)
    Correct
  • D
    70\(^0\)
7
The exterior angle of a triangle is equal to the sum of two
  • A
    exterior angles
  • B
    alternate angles.
  • C
    interior angles
  • D
    interior opposite angles
    Correct
8
The angles of a triangle are in the ratio 5 : 3 : 7, the triangle is :
  • A
    a right triangle
  • B
    an acute angled triangle
    Correct
  • C
    an obtuse angled triangle
  • D
    an isosceles triangle.
9
If one angle of a triangle is equal to the sum of the other two angles, then the triangle is :
  • A
    an obtuse angled triangle
  • B
    an isosceles triangle
  • C
    a right triangle
    Correct
  • D
    an equilateral triangle
10
The complement of (90\(^0\) – a) is :
  • A
    90\(^0\) – a
  • B
    90\(^0\) + a
  • C
    a\(^0\)
    Correct
  • D
    - a\(^0\)
11
Given lines \({{\rm{l}}_{\rm{1}}}\), \({{\rm{l}}_{\rm{2}}}\) and \({{\rm{l}}_{\rm{3}}}\) in figure are parallel. The value of x is :
Question 11 figure 1
  • A
    50\(^0\)
  • B
    40\(^0\)
  • C
    140\(^0\)
    Correct
  • D
    80\(^0\)
12
The number of lines that can pass through a given point is :
  • A
    only one
  • B
    infinitely many
    Correct
  • C
    one
  • D
    two
13
In the given figure, the measure of \(\angle ABC\) is :
Question 13 figure 1
  • A
    60\(^0\)
  • B
    100\(^0\)
  • C
    20\(^0\)
  • D
    80\(^0\)
    Correct
14
In figure, lines \({{\rm{l}}_{\rm{1}}}\) \(\parallel \) \({{\rm{l}}_{\rm{2}}}\). The value of x is :
Question 14 figure 1
  • A
    30\(^0\)
    Correct
  • B
    40\(^0\)
  • C
    50\(^0\)
  • D
    70\(^0\)
15
The number of line segments determined by three given non-collinear points is :
  • A
    four
  • B
    infinitely many
  • C
    three
    Correct
  • D
    two